55555050557 has 4 divisors (see below), whose sum is σ = 55567706976. Its totient is φ = 55542394140.

The previous prime is 55555050527. The next prime is 55555050581. The reversal of 55555050557 is 75505055555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75505055555 = 5 ⋅15101011111.

It is a cyclic number.

It is not a de Polignac number, because 55555050557 - 2²⁴ = 55538273341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555050527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6321623 + ... + 6330404.

It is an arithmetic number, because the mean of its divisors is an integer number (13891926744).

Almost surely, 2^55555050557 is an apocalyptic number.

It is an amenable number.

55555050557 is a deficient number, since it is larger than the sum of its proper divisors (12656419).

55555050557 is a wasteful number, since it uses less digits than its factorization.

55555050557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12656418.

The product of its (nonzero) digits is 2734375, while the sum is 47.

The spelling of 55555050557 in words is "fifty-five billion, five hundred fifty-five million, fifty thousand, five hundred fifty-seven".